[llvm] r178459 - X86TTI: Add accurate costs for itofp operations, based on the actual instruction counts.

Benjamin Kramer benny.kra at googlemail.com
Mon Apr 1 03:23:49 PDT 2013


Author: d0k
Date: Mon Apr  1 05:23:49 2013
New Revision: 178459

URL: http://llvm.org/viewvc/llvm-project?rev=178459&view=rev
Log:
X86TTI: Add accurate costs for itofp operations, based on the actual instruction counts.

Modified:
    llvm/trunk/lib/Target/X86/X86TargetTransformInfo.cpp
    llvm/trunk/test/Analysis/CostModel/X86/cast.ll
    llvm/trunk/test/Transforms/LoopVectorize/X86/conversion-cost.ll

Modified: llvm/trunk/lib/Target/X86/X86TargetTransformInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86TargetTransformInfo.cpp?rev=178459&r1=178458&r2=178459&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86TargetTransformInfo.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86TargetTransformInfo.cpp Mon Apr  1 05:23:49 2013
@@ -271,10 +271,33 @@ unsigned X86TTI::getCastInstrCost(unsign
     { ISD::ZERO_EXTEND, MVT::v4i64, MVT::v4i32, 1 },
     { ISD::TRUNCATE,    MVT::v4i32, MVT::v4i64, 1 },
     { ISD::TRUNCATE,    MVT::v8i16, MVT::v8i32, 1 },
-    { ISD::SINT_TO_FP,  MVT::v8f32, MVT::v8i8,  1 },
-    { ISD::SINT_TO_FP,  MVT::v4f32, MVT::v4i8,  1 },
-    { ISD::UINT_TO_FP,  MVT::v8f32, MVT::v8i8,  1 },
-    { ISD::UINT_TO_FP,  MVT::v4f32, MVT::v4i8,  1 },
+
+    { ISD::SINT_TO_FP,  MVT::v8f32, MVT::v8i1,  8 },
+    { ISD::SINT_TO_FP,  MVT::v8f32, MVT::v8i8,  8 },
+    { ISD::SINT_TO_FP,  MVT::v8f32, MVT::v8i16, 5 },
+    { ISD::SINT_TO_FP,  MVT::v8f32, MVT::v8i32, 1 },
+    { ISD::SINT_TO_FP,  MVT::v4f32, MVT::v4i1,  3 },
+    { ISD::SINT_TO_FP,  MVT::v4f32, MVT::v4i8,  3 },
+    { ISD::SINT_TO_FP,  MVT::v4f32, MVT::v4i16, 3 },
+    { ISD::SINT_TO_FP,  MVT::v4f32, MVT::v4i32, 1 },
+    { ISD::SINT_TO_FP,  MVT::v4f64, MVT::v4i1,  3 },
+    { ISD::SINT_TO_FP,  MVT::v4f64, MVT::v4i8,  3 },
+    { ISD::SINT_TO_FP,  MVT::v4f64, MVT::v4i16, 3 },
+    { ISD::SINT_TO_FP,  MVT::v4f64, MVT::v4i32, 1 },
+
+    { ISD::UINT_TO_FP,  MVT::v8f32, MVT::v8i1,  6 },
+    { ISD::UINT_TO_FP,  MVT::v8f32, MVT::v8i8,  5 },
+    { ISD::UINT_TO_FP,  MVT::v8f32, MVT::v8i16, 5 },
+    { ISD::UINT_TO_FP,  MVT::v8f32, MVT::v8i32, 9 },
+    { ISD::UINT_TO_FP,  MVT::v4f32, MVT::v4i1,  7 },
+    { ISD::UINT_TO_FP,  MVT::v4f32, MVT::v4i8,  2 },
+    { ISD::UINT_TO_FP,  MVT::v4f32, MVT::v4i16, 2 },
+    { ISD::UINT_TO_FP,  MVT::v4f32, MVT::v4i32, 6 },
+    { ISD::UINT_TO_FP,  MVT::v4f64, MVT::v4i1,  7 },
+    { ISD::UINT_TO_FP,  MVT::v4f64, MVT::v4i8,  2 },
+    { ISD::UINT_TO_FP,  MVT::v4f64, MVT::v4i16, 2 },
+    { ISD::UINT_TO_FP,  MVT::v4f64, MVT::v4i32, 6 },
+
     { ISD::FP_TO_SINT,  MVT::v8i8,  MVT::v8f32, 1 },
     { ISD::FP_TO_SINT,  MVT::v4i8,  MVT::v4f32, 1 },
     { ISD::ZERO_EXTEND, MVT::v8i32, MVT::v8i1,  6 },

Modified: llvm/trunk/test/Analysis/CostModel/X86/cast.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Analysis/CostModel/X86/cast.ll?rev=178459&r1=178458&r2=178459&view=diff
==============================================================================
--- llvm/trunk/test/Analysis/CostModel/X86/cast.ll (original)
+++ llvm/trunk/test/Analysis/CostModel/X86/cast.ll Mon Apr  1 05:23:49 2013
@@ -77,3 +77,78 @@ define i32 @masks4(<4 x i1> %in) {
   ret i32 undef
 }
 
+define void @sitofp4(<4 x i1> %a, <4 x i8> %b, <4 x i16> %c, <4 x i32> %d) {
+  ; CHECK: cost of 3 {{.*}} sitofp
+  %A1 = sitofp <4 x i1> %a to <4 x float>
+  ; CHECK: cost of 3 {{.*}} sitofp
+  %A2 = sitofp <4 x i1> %a to <4 x double>
+
+  ; CHECK: cost of 3 {{.*}} sitofp
+  %B1 = sitofp <4 x i8> %b to <4 x float>
+  ; CHECK: cost of 3 {{.*}} sitofp
+  %B2 = sitofp <4 x i8> %b to <4 x double>
+
+  ; CHECK: cost of 3 {{.*}} sitofp
+  %C1 = sitofp <4 x i16> %c to <4 x float>
+  ; CHECK: cost of 3 {{.*}} sitofp
+  %C2 = sitofp <4 x i16> %c to <4 x double>
+
+  ; CHECK: cost of 1 {{.*}} sitofp
+  %D1 = sitofp <4 x i32> %d to <4 x float>
+  ; CHECK: cost of 1 {{.*}} sitofp
+  %D2 = sitofp <4 x i32> %d to <4 x double>
+  ret void
+}
+
+define void @sitofp8(<8 x i1> %a, <8 x i8> %b, <8 x i16> %c, <8 x i32> %d) {
+  ; CHECK: cost of 8 {{.*}} sitofp
+  %A1 = sitofp <8 x i1> %a to <8 x float>
+
+  ; CHECK: cost of 8 {{.*}} sitofp
+  %B1 = sitofp <8 x i8> %b to <8 x float>
+
+  ; CHECK: cost of 5 {{.*}} sitofp
+  %C1 = sitofp <8 x i16> %c to <8 x float>
+
+  ; CHECK: cost of 1 {{.*}} sitofp
+  %D1 = sitofp <8 x i32> %d to <8 x float>
+  ret void
+}
+
+define void @uitofp4(<4 x i1> %a, <4 x i8> %b, <4 x i16> %c, <4 x i32> %d) {
+  ; CHECK: cost of 7 {{.*}} uitofp
+  %A1 = uitofp <4 x i1> %a to <4 x float>
+  ; CHECK: cost of 7 {{.*}} uitofp
+  %A2 = uitofp <4 x i1> %a to <4 x double>
+
+  ; CHECK: cost of 2 {{.*}} uitofp
+  %B1 = uitofp <4 x i8> %b to <4 x float>
+  ; CHECK: cost of 2 {{.*}} uitofp
+  %B2 = uitofp <4 x i8> %b to <4 x double>
+
+  ; CHECK: cost of 2 {{.*}} uitofp
+  %C1 = uitofp <4 x i16> %c to <4 x float>
+  ; CHECK: cost of 2 {{.*}} uitofp
+  %C2 = uitofp <4 x i16> %c to <4 x double>
+
+  ; CHECK: cost of 6 {{.*}} uitofp
+  %D1 = uitofp <4 x i32> %d to <4 x float>
+  ; CHECK: cost of 6 {{.*}} uitofp
+  %D2 = uitofp <4 x i32> %d to <4 x double>
+  ret void
+}
+
+define void @uitofp8(<8 x i1> %a, <8 x i8> %b, <8 x i16> %c, <8 x i32> %d) {
+  ; CHECK: cost of 6 {{.*}} uitofp
+  %A1 = uitofp <8 x i1> %a to <8 x float>
+
+  ; CHECK: cost of 5 {{.*}} uitofp
+  %B1 = uitofp <8 x i8> %b to <8 x float>
+
+  ; CHECK: cost of 5 {{.*}} uitofp
+  %C1 = uitofp <8 x i16> %c to <8 x float>
+
+  ; CHECK: cost of 9 {{.*}} uitofp
+  %D1 = uitofp <8 x i32> %d to <8 x float>
+  ret void
+}

Modified: llvm/trunk/test/Transforms/LoopVectorize/X86/conversion-cost.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/LoopVectorize/X86/conversion-cost.ll?rev=178459&r1=178458&r2=178459&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/LoopVectorize/X86/conversion-cost.ll (original)
+++ llvm/trunk/test/Transforms/LoopVectorize/X86/conversion-cost.ll Mon Apr  1 05:23:49 2013
@@ -33,11 +33,10 @@ define i32 @conversion_cost2(i32 %n, i8*
 
 .lr.ph:                                           ; preds = %0, %.lr.ph
   %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 9, %0 ]
-  %2 = add nsw i64 %indvars.iv, 3
-  %3 = trunc i64 %2 to i32
-  %4 = sitofp i32 %3 to float
-  %5 = getelementptr inbounds float* %B, i64 %indvars.iv
-  store float %4, float* %5, align 4
+  %add = add nsw i64 %indvars.iv, 3
+  %tofp = sitofp i64 %add to float
+  %gep = getelementptr inbounds float* %B, i64 %indvars.iv
+  store float %tofp, float* %gep, align 4
   %indvars.iv.next = add i64 %indvars.iv, 1
   %lftr.wideiv = trunc i64 %indvars.iv.next to i32
   %exitcond = icmp eq i32 %lftr.wideiv, %n





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